Yes Syncros right. Even if the spoke length is right, the results for the first time might be not as good as you expect them to be.
But if you are really up to it, to start wheelbuilding I mean - do it really slowly and steady.
To Wadsy - that only will work if you are changing the rim. T-Rod...
I am selling a fairly immaculate (for its age) 53cm Bottecchia Model Special Deluxe.
Vintage 1970's Beautiful BOTTECCHIA Deluxe road bike. Teodoro Carnielli "Campione Del Mondo" Special Deluxe model - 10-Speed Road Bike, Campagnolo drive. Frame: Cromoly tubing fully chrome plated, 53 cm seat...